DS1385 データシートの表示（PDF） - Dallas Semiconductor -> Maxim Integrated
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DS1385 Datasheet PDF : 20 Pages
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DS1385/DS1387
RTC AC TIMING CHARACTERISTICS
PARAMETER
SYMBOL MIN
Cycle Time
tCYC
305
Pulse Width, RD/WR Low
PWEH
125
Pulse Width, RD/WR High
PWEL
150
Input Rise and Fall Time
tR, tF
Chip Select Setup Time Before
tCS
20
WR or RD
Chip Select Hold Time
Read Data Hold Time
Write Data Hold Time
Muxed Address Valid Time to
ALE Fall
tCH
0
tDHR
10
tDHW
0
tASL
30
Muxed Address Hold Time from
tAHL
10
ALE Fall
RD or WR High Setup to ALE
Rise
tASD
25
Pulse Width ALE High
PWASH
60
ALE Low Setup to RD or WR Fall
tASED
40
Output Data Delay Time from RD
tDDR
20
Data Setup Time to Write
tDSW
100
IRQ Release from RD
tIRD
(0°C to 70°C; VCC = 4.5V to 5.5V)
TYP
MAX
UNITS NOTES
DC
ns
ns
ns
30
ns
ns
ns
80
ns
ns
ns
ns
ns
ns
ns
120
ns
5
ns
2
µs
012496 12/20
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